Evolution of the Fermi Surface And Quasiparticle Renormalization Through a Van Hove Singularity in Sr2-YLayRuO4
Journal Article
·
· Phys.Rev.Lett.99:187001,2007
OSTI ID:958665
We employ a combination of chemical substitution and angle resolved photoemission spectroscopy to prove that the Fermi level in the {gamma} band of Sr{sub 2-y}La{sub y}RuO{sub 4} can be made to traverse a van Hove singularity. Remarkably, the large mass renormalization has little dependence on either k or doping. By combining the results from photoemission with thermodynamic measurements on the same batches of crystals, we deduce a parameterization of the full many-body quasiparticle dispersion in Sr{sub 2}RuO{sub 4} which extends from the Fermi level to approximately 20 meV above it.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 958665
- Report Number(s):
- SLAC-REPRINT-2009-009; PRLTAO; TRN: US201001%%659
- Journal Information:
- Phys.Rev.Lett.99:187001,2007, Vol. 99, Issue 18; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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